{
  "manageEntity": {
    "action": "Save",
    "entityId": "1225779747",
    "entityType": "Track",
    "nonce": "0xb77aa1553fd6bac6dd41b26626f84eefb2fc25cf73a13dc55ee487e9bd6bd438",
    "signature": "0xa22bd1ab3cb1ed531364b9fbc06a73378fda82115fb29436cb7bdc68e69a30186bf1ccea81030fb83e2b38042b5551531e222516364d30048ab65a2e62275f8e1b",
    "signer": "0x9369ae91F6A1cC4996D9126FD991d64e7E24c805",
    "userId": "333763354"
  }
}