{
  "manageEntity": {
    "action": "Save",
    "entityId": "2061856200",
    "entityType": "Track",
    "nonce": "0x1e2b53baf6c470ee99561721c13e6d1ee8ac8efebf4f5b6f066edc47929ad63d",
    "signature": "0xe7978a5ef8f44f77c5d71220fa1f2f28ea84292fbb6ec5b7333a4e09cd93470533f9f7100b3bf03d3f08a8cb249b1d0f940307b73c15f0b2faa6a586ca2f4c021b",
    "signer": "0x38C35E6d98e3a8e47c96Cc5d8e8DC05C8797Ce75",
    "userId": "266305231"
  }
}