{
  "manageEntity": {
    "action": "Save",
    "entityId": "173054683",
    "entityType": "Track",
    "nonce": "0x2ed5c54dd6bf5693887a5816188d478913939312bdd78ae0289c74b0c9d634ac",
    "signature": "0x252d808d936a8f19407f1064bd0179b6b747925e87b7d584997ce45d37ee8fa73b6ebcb456a06cf3f382ecbdc6a9ce5e60b32cf578ef10764321f36087ed2b301b",
    "signer": "0x102a924C1c076Dcb5816d20E32Dcb6F00e75F2C9",
    "userId": "485987672"
  }
}