{
  "manageEntity": {
    "action": "Save",
    "entityId": "1840192448",
    "entityType": "Track",
    "nonce": "0x4ddf27afb388f08e7331f725d6535591ba08e5244aa0d20602fde1155a39c6d5",
    "signature": "0xc815c0deb0b66b82a12846a14bdf3b9d920a1d0e475d4646b4d186ea9eba89c470f42be7b49fbb7e18583e5fd5540140214d89d3ad75942c4e6911e85945a51d1b",
    "signer": "0x38C35E6d98e3a8e47c96Cc5d8e8DC05C8797Ce75",
    "userId": "266305231"
  }
}