{
  "manageEntity": {
    "action": "Save",
    "entityId": "201773",
    "entityType": "Track",
    "nonce": "0x635426c0cd75e9e473468d8e74ffc1f120628af1d9de568834917baf22fbf05c",
    "signature": "0x5d4db84ae161590f65ebd40de78c3f16e38b42f1a1fa0fedbdf54a440ddd673944dde9ebdfdd1c6b6e2b5152fc4258a71cfa2489ad9c43da73aa1c434921358c1c",
    "signer": "0x40aE1C539711FBaE3930131b028D9c764fD8EaCb",
    "userId": "35251"
  }
}