{
  "manageEntity": {
    "action": "Save",
    "entityId": "222651873",
    "entityType": "Track",
    "nonce": "0x16ae4af68132be6d3c31099fad9a194a71f2f4d7c0e662dec938bcf4dbe82bd4",
    "signature": "0x3cc8f6385ab58086e9ccc9d398a12e48c88bff4b43953fe99e7acb1d686000e470008b034447daa609b4f32729c38c355177769bc1fc74d1957c99352d21b09a1c",
    "signer": "0x43dA66b40816c8fb9e2B0AA77E0643192169AF14",
    "userId": "636236864"
  }
}