{
  "manageEntity": {
    "action": "Save",
    "entityId": "814310",
    "entityType": "Track",
    "nonce": "0xb82e7aa5b49213b66e36649c1ff1804a570715e4fd1af7996c2554dc62f3c65b",
    "signature": "0x4355693eface380fe072a41aec0f37cec7c5032c23ce4fc55a3c3c9e01143438621a7f6cbcecdf03c19585dde58516f3f17a7f84ba76755e81559dd8c8727ecc1c",
    "signer": "0x44BAdCFCf42113CbB67f519e4efa576B336f9bf7",
    "userId": "136844578"
  }
}