{
  "manageEntity": {
    "action": "Save",
    "entityId": "1746570393",
    "entityType": "Track",
    "nonce": "0x4ec9d8c7932c0a6d1b6d075fd9ed22ce0d5bb1536fee345f400f12ff035b01e2",
    "signature": "0x6d1d3a908755f7fa97abc09435e920d018eb85f5a755aaa8539387dd2075b0ac0cd1c5e74a792e17add624206fda38978ee48f9b23c11a86cdd90d01555158a61c",
    "signer": "0x2B171214e998033E806F72301307B2160CD94DdB",
    "userId": "489165782"
  }
}