{
  "manageEntity": {
    "action": "Save",
    "entityId": "733043",
    "entityType": "Track",
    "nonce": "0xe6ce5028853c3820aaaac17d0372cf25ff33d7401449a831ce1afbbb158e04be",
    "signature": "0xab3c746c267cad21261ff862fec8fbefcfe60b968aa7b34623c1adf32d4ee3ba377f3876382193bbaa28246aec6600491642fbd9c7fe50698cbe634f0405758a1c",
    "signer": "0x4b1AE7bCBD484FF09f3E367aD5DA8eC58151764B",
    "userId": "980626000"
  }
}