{
  "manageEntity": {
    "action": "Save",
    "entityId": "959934506",
    "entityType": "Track",
    "nonce": "0x295454be6127fb05970ebb0dfce6e570d5cc0c39413d5e3f35efa5991e17efd5",
    "signature": "0x146f2e37a4d8a4f7d76842b553ac24ec1543f5ea09cecc3281dc963c99f2a2457bcd4e494fca7103f4ac2b02a5df4dd45e100e1046c6396fdba432cab4f083e41c",
    "signer": "0xD9254B079e0e1571E56512C57188F2eec899054f",
    "userId": "854498636"
  }
}