{
  "manageEntity": {
    "action": "Save",
    "entityId": "276558968",
    "entityType": "Track",
    "nonce": "0x510b30ef98bef4c2f7a34f7007e831296c774160221e01cbc48f0fcc67438b76",
    "signature": "0x368f5e24f4308c19a5724315df4759ec003ece1b7033a0cd9dd1873e08e61f0d68a7e3669950b22f2fe3af543f96d9e518cbd019e7b08d16033027c33760a6f51b",
    "signer": "0x1d868e2cc29848871636BdCF83a08A975835b6DD",
    "userId": "120328011"
  }
}