{
  "manageEntity": {
    "action": "Save",
    "entityId": "1974772202",
    "entityType": "Track",
    "nonce": "0xe1e75d7820ab776013eff816ee4729258bd9b82f54f455561c00027888b4995f",
    "signature": "0x4d979b5faf5fe35c4689d32f599910c7d7695df21ce7305c606584d34919e690235ce0ef73f99f232792b2dc2143dcc5ae13ed03209801cb08690c48e929a9221c",
    "signer": "0x43dA66b40816c8fb9e2B0AA77E0643192169AF14",
    "userId": "636236864"
  }
}