{
  "manageEntity": {
    "action": "Save",
    "entityId": "534258",
    "entityType": "Track",
    "nonce": "0x147a4628dbca36b435736d01affc689970f34b3955fd1de8874a00f20263480d",
    "signature": "0x585ef75c3c83a94cf195a1a1022d94d1d7b6202beff655d40ba42f1cec1506b127acbdb96874746ed63d15ba9d8f14e28b11aacab5ae7bc4531a20018fca4e5c1b",
    "signer": "0x43dA66b40816c8fb9e2B0AA77E0643192169AF14",
    "userId": "636236864"
  }
}