{
  "manageEntity": {
    "action": "Save",
    "entityId": "804565958",
    "entityType": "Track",
    "nonce": "0x9abe413e6cffcf333520764ea829ba6700dd77ed7d383d4bbae16d07ef5d1684",
    "signature": "0xf002aa4fd69a3d912e7e7481f1c1d6cc570d849b64e1979662cd4cbb277c58da0a7cebf40b070262083804604f4c55b05fbfc48b2c49807fcfa982c99c24e8ff1b",
    "signer": "0x0b901AE3Eb7b439095858D82Ff194CfeD0Fd3396",
    "userId": "167557"
  }
}