{
  "manageEntity": {
    "action": "Save",
    "entityId": "57313303",
    "entityType": "Track",
    "nonce": "0x6f5629450ae2e096367f0aec55c78b3f45bae2f0350062c54591170dc09b3fdd",
    "signature": "0x49a944b4ef2c03dce665a6c041b50fac20f572d85f6548d0f869ad5008c99c833167c04daa6783914afbf41d223510a00146f59b3315f47a90790b32dee53cd41b",
    "signer": "0x5452f86EfcB1153FF9C10bdbe4103Ce25434D124",
    "userId": "620307004"
  }
}