{
  "manageEntity": {
    "action": "Save",
    "entityId": "1121225141",
    "entityType": "Track",
    "nonce": "0xa6d39ed7535e7ab1cfb107f429ebcf37ca7011ee679584b0581c874341e76599",
    "signature": "0xfbc51dd9f87b863a775ba55073beb2953d5902eb2ed94b4c8d340c63dce1ae2b2c680ed037a8b70da0ab81241aae806c59564b70835ec85d09dfd60e32365f091b",
    "signer": "0x7E7b9c4DAC3F284d889a5bc274eA80b8BA5F63ee",
    "userId": "670307808"
  }
}