{
  "manageEntity": {
    "action": "Save",
    "entityId": "945606365",
    "entityType": "Track",
    "nonce": "0xdee1165edfcadac2872ff779b6f04da16713de78d336ea99b6fc45a8e380bc92",
    "signature": "0x25019c5ae67d00bdcb0e940c6e90bdf5dc176b76ec2d6bfc7baabeb268dda4ff7187679cb8d3c0da7f63f1cd55dd1e2677a88c41b540482117eb3a299e1bd0451c",
    "signer": "0x40aE1C539711FBaE3930131b028D9c764fD8EaCb",
    "userId": "35251"
  }
}