{
  "manageEntity": {
    "action": "Save",
    "entityId": "301630347",
    "entityType": "Track",
    "nonce": "0xb5cbcf33fd2243178e66bbf39b0e02166bed03d7a4af00b30ead141dd155694c",
    "signature": "0x556bc338d27b65932593b42e897d46f0763a86bcbb0fa29a1128bb4d615e3e3829bf2bbcabb1dc7a70e84d5438942dbe0279c824f100467e0f608ba4d30009f01c",
    "signer": "0x43dA66b40816c8fb9e2B0AA77E0643192169AF14",
    "userId": "636236864"
  }
}