{
  "manageEntity": {
    "action": "Save",
    "entityId": "451173317",
    "entityType": "Track",
    "nonce": "0x47ddb501f442b31e8a5bcc749d36ff7f208c03cd86b7b7c6d8c7a31adf0caf5d",
    "signature": "0x1215237521e844b50fcfb291c8e2b32c386e987e51d6f6e9fa5da4f3c5ea569030a44d5b8f708d1aabe60dfd8758851c7e171468c4a5f317516b3d15d4c6e0bb1b",
    "signer": "0x283a6Fd0bE176865B404dfc3B2805D3a2701d62e",
    "userId": "484365174"
  }
}