{
  "manageEntity": {
    "action": "Save",
    "entityId": "624536007",
    "entityType": "Track",
    "nonce": "0xb2db1759a550817b906034c7dab633ffb97e562fc481afbdca24bf994cc7530a",
    "signature": "0xc9931f22387b2ed0b6821bb5bd84f1e1d0dd9f819c18fd160978ccbfd91101e121594746e359ab184c064b32c54dff16a54eec672e38614631afca907464e6601b",
    "signer": "0x7451Cf52e883bc4483b88591c194dc3942E7F191",
    "userId": "584186978"
  }
}