{
  "manageEntity": {
    "action": "Save",
    "entityId": "306599",
    "entityType": "Track",
    "nonce": "0x17edf1d6e9d7219e575e12a88a8b1b8e6725d9917907651974eea00c4e743ce2",
    "signature": "0xa0b0445cafca19686dcfa5a7d6e691f9123b4e402bf025571c3072d12a08e80153e44dcfdf9823f5c48eba4616d99a9c6368ab85399d4fd044f31a32a1826b7e1c",
    "signer": "0xa2DaB1ebF6D10325b0948C994b592F7abB2Df44C",
    "userId": "728570067"
  }
}