{
  "manageEntity": {
    "action": "Save",
    "entityId": "143273398",
    "entityType": "Track",
    "nonce": "0xd543e745fc5a355ef3f14c60f35b24f6cae7391b9001214ebe19b66687504962",
    "signature": "0x4528a0e270d3bda172a547e2c844a0b5deac4303317946c4218b10352511e5b075f08fe30c6100749d4c98d37acfbbfd70d34462121c68aae08e9a962d783c091c",
    "signer": "0x59765b22C96E88dA578af23E8611d6ca2dcCd7C9",
    "userId": "377610060"
  }
}