{
  "manageEntity": {
    "action": "Save",
    "entityId": "324747686",
    "entityType": "Track",
    "nonce": "0x8eb3f7ad2d1e139cb3eb53eafbd9f7de380091da7cbcd0ca865f2d079b1c69bd",
    "signature": "0x70cd8b8a1655e5a8d8bda8f486fde9bd61bf3d07e4897c691e4d4e0fec7fa5aa2892429266c934ad5a38dc67058082de0d37b95150aa527cbd4d8752957140501b",
    "signer": "0x204E506f1D5498d2CABD41d2fc7a3078d5792835",
    "userId": "768479471"
  }
}