{
  "manageEntity": {
    "action": "Save",
    "entityId": "1432481808",
    "entityType": "Track",
    "nonce": "0xe2bae9227bafecfb44ba8dc1169d1baf8f86e6b2c93e26d676d1a2260ab9cae1",
    "signature": "0xccbd912d62d14fcb4f0b7aefaefdeec23b1199572ba0d7e1de969fdcf537398063678f5b04680bc4269704f0ffb3e5ce7f05a05034c379817300f6476a3ac4c81b",
    "signer": "0x84B42609E987DD0953e02498E61987fB833B7C92",
    "userId": "887547386"
  }
}