{
  "manageEntity": {
    "action": "Save",
    "entityId": "1871845176",
    "entityType": "Track",
    "nonce": "0x326b9fc0421f1717c45bb4c03b3463a07e9b3f503c64ded79705af8d690d2770",
    "signature": "0x30692bb3aac59178d3efe6e219c1a22424f0541d401fe8a0d9a6e1cc23cc0b6f0e72cc4215f51931a9e50b73d2aa807ac91fbb30a53c67bb401123fad433045f1b",
    "signer": "0x5452f86EfcB1153FF9C10bdbe4103Ce25434D124",
    "userId": "620307004"
  }
}