{
  "manageEntity": {
    "action": "Save",
    "entityId": "799564",
    "entityType": "Track",
    "nonce": "0xd126843571713e07e51b19432f1a5e45184f1154a62d6652708a72e58f82d183",
    "signature": "0x4c039a50d3a1910d349a64af94a39875f06937c6917add8a93a4ea3170a3d70e5d8a1812189a5c04448480a058be33d7adda3b303b4579f15d12329664f0947a1c",
    "signer": "0xfa1f98f0530E55C2BEFA45f0F1B3A699b4559136",
    "userId": "149566028"
  }
}