{
  "manageEntity": {
    "action": "Save",
    "entityId": "1674001840",
    "entityType": "Track",
    "nonce": "0xab8f8580e087fc2febb81e80874fde702ca5d8fdb323ccf95ab4983f3aabad10",
    "signature": "0xe3043b2a1429104d0a90add04ebe3fb30812dcb1a6e495a89a258c205cae391b40594cd4e595ec09548c44adbf5430cba948c1ef3c98cd42a0dfa4d39a4a6d1a1c",
    "signer": "0xF50C225e7d3C705f83cFE11452b4359B64F13Ce3",
    "userId": "962001878"
  }
}