{
  "manageEntity": {
    "action": "Save",
    "entityId": "37262542",
    "entityType": "Track",
    "nonce": "0xb691ec4a5e9c5023c2ee6b0df5789242aebcc3390776f7d5500dd4558dec4227",
    "signature": "0xe4647ac7d3338ce1af0022162f81f8f5dfa542639607143fc5ac130a7916427f29c49699d57a623550163fb24eb3f67952da202b9833b735a853c550d65f00f41b",
    "signer": "0x26Feee0AaDc0e2d8f7aBEd5cdb0bCD7D325F618d",
    "userId": "354535"
  }
}