{
  "manageEntity": {
    "action": "Save",
    "entityId": "1946278774",
    "entityType": "Track",
    "nonce": "0x3c66beadd9e69bcbbc54b8df63fb6d69c5d397fbf05edda3d0450568aae2d4e8",
    "signature": "0x2a0e13c933ed54e1622b6a774805de2792864e0bd1ab1fe58071790042f48cd4677f5ad8a99fbe2cdf78644e96102cdd5c8d51742f2207155922aa77cd0772dc1c",
    "signer": "0x712Aca9aA6ac07F98dcEC338Be9C15c3Dc47d569",
    "userId": "12730129"
  }
}