{
  "manageEntity": {
    "action": "Save",
    "entityId": "1185088922",
    "entityType": "Track",
    "nonce": "0x16b7a20a0f1f115ddc8b662e0e16ad6f5247fd21246121511642782485198e46",
    "signature": "0x4a8ce44dce171a9738d148cfaa2130d8d51f9b9951beaa9ca5149f1fc33f0d421f531de2eb90865d186a766b21f1f9927dae69d8af2307eef69707398896a6571c",
    "signer": "0x204E506f1D5498d2CABD41d2fc7a3078d5792835",
    "userId": "768479471"
  }
}