{
  "manageEntity": {
    "action": "Save",
    "entityId": "1218278042",
    "entityType": "Track",
    "nonce": "0x1c8f342f3809a5a5816afcb21f15d2e14f3c12064a589dd9c85a5ccd19062d79",
    "signature": "0x4e360a33ae88ad9ef6e5dfd929b68f8fa971286d79a49008706f90fd12e6a1367b4996edd7b16a7fa9fd72d158603c5eca10a535b7ed0c063414baee3d09ad2e1c",
    "signer": "0x367680E9B4EfE77a6636091FA6c2c71749Cf7C60",
    "userId": "40274"
  }
}