{
  "manageEntity": {
    "action": "Save",
    "entityId": "972376916",
    "entityType": "Track",
    "nonce": "0x8d64127630aa9d1061b35f36f62de69c73dfe55b8be48a48fa79646b3336749b",
    "signature": "0x9448f869a82114baf90d41884aa90079fb3fec9460c62c588b52b066fe40198c2348666f13b4a412c55981cb29f25bc9688828d77f54b136dd04a76d8c130b571c",
    "signer": "0x43dA66b40816c8fb9e2B0AA77E0643192169AF14",
    "userId": "636236864"
  }
}