{
  "manageEntity": {
    "action": "Save",
    "entityId": "942392870",
    "entityType": "Track",
    "nonce": "0x142c7a6ce72158adcddfe1d9377d1b38a8e6734060978c4cf2f9399beb521031",
    "signature": "0x2f28acc1d5cd5eadaa7ef272633fcfd7207df0675e7a1d86139beb6d34c526874daa1c2e3697417ada907a596508c4c4706360964be20124a8634744cbb9400f1c",
    "signer": "0xC9e4fe89311517E71e968f6DE26A6c075A639F41",
    "userId": "964899801"
  }
}