{
  "manageEntity": {
    "action": "Save",
    "entityId": "1007587050",
    "entityType": "Track",
    "nonce": "0x94fd371e6e1b9b54ec4be9c1a27cb8d000c0dc8ab21b389ebdddb7ece98fd6ce",
    "signature": "0xe7631ee51dbc3495a9c8091d2787d22fcd30ea5d995e8f3c5342166fbed6b2b20dcd4cb5a1589a76a021acbe25890874238533cc200aa4aaa0c5e69fea2588cf1c",
    "signer": "0x40aE1C539711FBaE3930131b028D9c764fD8EaCb",
    "userId": "35251"
  }
}