{
  "manageEntity": {
    "action": "Save",
    "entityId": "1052928233",
    "entityType": "Track",
    "nonce": "0x73872576d43b26a25c4c73c5eb451e59c9a9f89a56c5c17b52dfc5dba80bd28c",
    "signature": "0x051820a694793db1b6d3fe35336a0f611671d974fb7463710bc7b148b0e5bb2c3e74eed7c2e825bfff8b21d32d6c98198c1b6dab366cfcd72de98729f73343f61b",
    "signer": "0x43dA66b40816c8fb9e2B0AA77E0643192169AF14",
    "userId": "636236864"
  }
}