{
  "manageEntity": {
    "action": "Save",
    "entityId": "1071414",
    "entityType": "Track",
    "nonce": "0x7fa12d45a22b02074b2d3ce6e54d4a0e5d3806de6865f66791accc4fe4e601c2",
    "signature": "0xc86aa7ce7f60da9e1892c50bbc13da9583bc3f235d51b58c46ea7541a2f5a1c41631abbf0f6f6a48c10615b2a5efed4acce8d2d444e865f1b96585d5ae9217691c",
    "signer": "0xdB791822A11f5aDc830669bdADa8121a4558D7A3",
    "userId": "347139808"
  }
}