{
  "manageEntity": {
    "action": "Save",
    "entityId": "1943277703",
    "entityType": "Track",
    "nonce": "0x9e1ee4467d67e04cc2432a96e26ef95c62b0f9496e49be853d72acd7cc44bc77",
    "signature": "0x5ce2bd18a3948db4caa2f7721d6a54607b7b01018f82a414f7495d439840fd1802a284d13c35aabc0af40d2a747b2a7d2573d041bcff91711fc7d7986fe747021b",
    "signer": "0x1d868e2cc29848871636BdCF83a08A975835b6DD",
    "userId": "120328011"
  }
}