{
  "manageEntity": {
    "action": "Save",
    "entityId": "1835610143",
    "entityType": "Track",
    "nonce": "0xc49d86d3e9621c81f086011d9c1105937e2cf359b7f2ac61ca6165d63ade0db6",
    "signature": "0x8bd4885effb5c6cba9e135297122285aca42c6d0d0f00d1f857ae7720dac02a50bdf03a99eff1a8086e2f3aaf38f45f2e50a2c79820b92fa9fbdb7e1d1b8b0b51c",
    "signer": "0x40aE1C539711FBaE3930131b028D9c764fD8EaCb",
    "userId": "35251"
  }
}