{
  "manageEntity": {
    "action": "Save",
    "entityId": "1617653358",
    "entityType": "Track",
    "nonce": "0xd5259e00d365eb4a31e6b7656d0e2e9a26ec688a7767ecc0b15082f2a97d37f9",
    "signature": "0xc447610fb83d09e6bc432c5542187285ffd40529dfde0a60372208f054fc92d03baca78a12921839dc60f6902f28d8616378097faa9214d0be974e3306ffd76e1b",
    "signer": "0x44BAdCFCf42113CbB67f519e4efa576B336f9bf7",
    "userId": "136844578"
  }
}