{
  "manageEntity": {
    "action": "Save",
    "entityId": "336112",
    "entityType": "Track",
    "nonce": "0x4289b8ad8473cc3fdab13976a833d32cf779e1db82e2eefb366afdc69f47c5ff",
    "signature": "0x3906f3a1734bc8586150ba93d5e7149d66af57910060c3a920b344932c316cd82c72fd9696ba9c5642b44b08f11ca7ef471feb44b2fddbf2ca17908e3f9ede051c",
    "signer": "0x243A439c272133AEEE0073AF4986dE391C430866",
    "userId": "77551267"
  }
}